Automatic acid-base adjusting system and wastewater treatment method based on same

Abstract

The invention relates to a control and regulation system, provides an automatic acid-base regulation system, and aims to solve the technical problem that the pH value of wastewater is still unstable after the pH value of the wastewater is regulated by a wastewater treatment method. The adjusting system comprises three channels, namely an input channel, an alkali liquor channel and an acid liquor channel, and liquid in the input channel can selectively enter the alkali liquor channel or the acid liquor channel; the detection end of the acid-base detector is arranged in the input channel; an output port of the acid material channel is formed in the alkali liquor channel; an outlet of the alkaline material channel is formed in the acid liquid channel; the controller is electrically connected with the acid-base detector and is used for controlling liquid to selectively flow into the alkali liquid channel or the acid liquid channel; the invention further provides a wastewater treatment method based on the acid-base automatic adjusting system. The technical scheme has the advantages that the addition amount of materials is dynamically adjusted, and the treated wastewater is neutral.

Description

Technical Field

[0001] The invention relates to a control system for liquid pH, and in particular to an automatic acid-base adjustment system and a wastewater treatment method based on the system. Background Art

[0002] In the biopharmaceutical industry, a lot of wastewater is generated. During the wastewater treatment process, the pH value of the wastewater needs to be adjusted to make the wastewater neutral before subsequent treatment.

[0003] In the current treatment process, the pH value of a batch of wastewater needs to be measured, and then some necessary calculations are performed to determine how much blending material should be added to the wastewater to make the batch of wastewater reach a neutral state.

[0004] As far as the existing technology is concerned, different batches of wastewater are tested before adding, which results in low treatment efficiency. In addition, the pH value of each batch of wastewater fluctuates during the continuous output process, resulting in insufficient or excessive treatment volume in the method of quantitatively adding blending materials, causing the pH value of the treated wastewater to remain acidic or alkaline. Summary of the invention

[0005] In view of the technical problem of uncertain pH value in the prior art method for treating wastewater, the present invention provides an automatic acid-base adjustment system, which has the advantage of dynamically adjusting the amount of blending material added to make the treated wastewater neutral.

[0006] The technical solution of the present invention is: An acid-base automatic adjustment system, comprising: Three-way channels, namely input channel, alkali channel and acid channel; Acid-base detector, whose detection end is arranged in the input channel, and is used to determine the acidity and alkalinity of the liquid in the input channel; an acid material channel, the outlet of which is arranged on the alkali solution channel; an alkali material channel, the outlet of which is arranged on the acid liquid channel; A controller is electrically connected to the acid-base detector and is used to control the liquid to selectively flow into the alkaline solution channel or the acid solution channel.

[0007] Optionally, the alkali solution channel has an alkali solution temporary storage area, and the acid solution channel has an acid solution temporary storage area; The regulating system also includes an alkali zone pump and an acid zone pump, wherein the alkali zone pump is connected to the alkali solution temporary storage zone and the acid solution channel, and the acid zone pump is connected to the acid solution temporary storage zone and the alkali solution channel.

[0008] Optionally, there are multiple communication positions between the alkali zone pump and the acid channel, and an acid-base detector is provided between each of the communication positions; There are multiple communication positions between the acid zone pump and the alkali solution channel, and an acid-base detector is arranged between each of the communication positions.

[0009] Optionally, an eddy current zone is provided in the middle of the input channel, and the detection end of the acid-base detector is provided in the eddy current zone; A gate is respectively provided on the alkaline solution channel and the acid solution channel, and the two gates are respectively electrically connected to the controller.

[0010] Optionally, an impact portion is respectively provided on the alkali solution channel and the acid solution channel, and the two impact portions are respectively located downstream of the alkali material channel and the acid material channel; Both ends of the impact portion have a height difference, and the upstream of the impact portion is higher than the downstream thereof.

[0011] Optionally, the acid-base detector includes a first detector, a second detector and a third detector; The detection end of the first detector is arranged on the input channel; The detection end of the second detector is arranged on the alkali solution channel and is located downstream of the acid material channel; The detection end of the third detector is arranged on the acid liquid channel and is located downstream of the alkali material channel.

[0012] Optionally, a first acid material branch is provided on the acid material channel, and an output end of the first acid material branch is provided on the acid liquid channel and is located downstream of the third detector; The alkali material channel is provided with a first alkali material branch, and the output end of the first alkali material branch is provided on the alkali liquid channel and is located downstream of the second detector.

[0013] Optionally, a second acid material branch is provided on the acid material channel, and an output end of the second acid material branch is provided on the alkali solution channel and is located downstream of the second detector; The alkali material channel is provided with a second alkali material branch, and the output end of the second alkali material branch is provided on the acid liquid channel and is located downstream of the third detector.

[0014] Optionally, the following steps are included: Step 1, introducing wastewater into the acid-base adjustment system through the input channel; Step 2, introducing the acid-base adjusted wastewater into the flotation machine, and adding flocculant and calcium chloride into the flotation machine; Step 3, the wastewater outputted by the air flotation machine is introduced into a sedimentation tank, and is allowed to settle in the sedimentation tank, and the sediment at the bottom of the sedimentation tank is made into a mud cake, which is then processed centrally; Step 4: Filter the liquid in the sedimentation tank and test it at the discharge port. If it meets the standards, it will be discharged directly. If it does not meet the standards, it will be returned to the collection tank for recycling treatment.

[0015] Optionally, the liquids output from the alkaline liquid channel and the acid liquid channel in the acid-base regulating system are both introduced into the flotation machine; in the step 4, the liquid in the sedimentation tank is first filtered through the sand and gravel area, then adsorbed through the activated carbon area, and finally guided to the discharge port for detection; Wherein, backwash structures are respectively arranged for the sand and gravel area and the activated carbon area, and the water generated by the backwash is introduced into the water collection tank.

[0016] Compared with the prior art, the present invention has the following beneficial effects: First, the wastewater is introduced into the input channel, and the pH value of the wastewater in the input channel is monitored and detected in real time by an acid-base detector, and the detected pH value is fed back to the controller. The controller selectively introduces the wastewater into the alkaline channel or the acid channel according to the measured pH value, and opens the material channel on the corresponding channel to neutralize the wastewater in the acid channel or the alkaline channel.

[0017] By using the acid-base automatic adjustment system in the technical solution to treat wastewater, the treatment efficiency and the accuracy of the pH value of the wastewater can be greatly improved in the entire wastewater treatment method, so that the discharged wastewater can be treated in a neutral state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a simplified structural diagram of the acid-base automatic adjustment system; Figure 2 It is the structural diagram of the input channel; Figure 3 A process flow chart for the wastewater treatment method; Figure 4 It is a schematic diagram of the three-dimensional structure of the impact part; Figure 5 This is a schematic diagram of the three-dimensional structure of the gate.

[0020] Reference numerals: Input channel 1, left side wall 1-1, right side wall 1-2, a bottom surface 1-3, left arc-shaped portion 1-4, right arc-shaped portion 1-5; Lye channel 2; Acid channel 3; Acid-base detector 4, first detector 4-1, second detector 4-2, third detector 4-3; Acid material channel 5, first acid material branch 5-1, second acid material branch 5-2; Alkali material channel 6, first alkali material branch 6-1, second alkali material branch 6-2; Controller 7; Eddy zone 8; Gate 9, slide 9-1, door panel 9-2, gate motor 9-3, screw 9-4; Impact part 10, disturbing body 10-1; Solenoid valve 11; Screw feeding structure 12. DETAILED DESCRIPTION

[0021] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0024] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] Example 1

[0026] See also Figure 1 and Figure 2, an acid-base automatic adjustment system, comprising a three-way channel, an acid-base detector 4, an acid material channel 5, an alkali material channel 6 and a controller 7. Specifically, the three-way channel comprises an input channel 1, an alkali channel 2 and an acid channel 3. Among them, one end of the input channel 1 is connected to the wastewater outlet, and one end of the alkali channel 2 and one end of the acid channel 3 are both connected to the other end of the input channel 1.

[0027] The acid-base detector 4 has a detection end, and the detection end is arranged in the input channel 1, and detects the pH value of the wastewater in the input channel 1 in real time. The acid-base detector 4 is electrically connected to the controller 7, the controller 7 includes a PLC processor, and the controller 7 can control the acid channel 3 or the alkali channel 2 to be in an unblocked state, and the other channel to be in a closed state, that is, when the alkali channel 2 is unblocked, the acid channel 3 is in a closed state, and when the acid channel 3 is unblocked, the alkali channel 2 is in a closed state.

[0028] The output port of the acid material channel 5 is arranged on the alkali liquid channel 2, and the output port of the alkali material channel 6 is arranged on the acid liquid channel 3. Moreover, the controller 7 can directly control the operation of the acid material channel 5 or the operation of the alkali material channel 6.

[0029] The specific control method is that when the acid-base detector 4 measures that the wastewater is acidic, the controller 7 controls the acid channel 3 to open, the alkali channel 2 to close, and the alkali material channel 6 to work, so that the wastewater flows to the acid channel 3, and the alkaline material is fed into the acid channel 3. At the same time, the acid material channel 5 is controlled to be closed.

[0030] The working principle of this embodiment is to first introduce wastewater into the input channel 1, and use the acid-base detector 4 to monitor and detect the pH value of the wastewater in the input channel 1 in real time, and feed back the detected pH value to the controller 7. The controller 7 selectively introduces the wastewater into the alkaline solution channel 2 or the acid solution channel 3 according to the measured pH value, and opens the material channel on the corresponding channel to neutralize the wastewater in the acid solution channel 3 or the alkaline solution channel 2.

[0031] By using the acid-base automatic adjustment system in the technical solution to treat wastewater, the treatment efficiency and the accuracy of the pH value of the wastewater can be greatly improved in the entire wastewater treatment method, so that the discharged wastewater can be treated in a neutral state.

[0032] Example 2

[0033] The difference between this embodiment 2 and embodiment 1 is that an alkali solution temporary storage area is provided on the alkali solution channel 2, and an acid solution temporary storage area is provided on the acid solution channel 3. By providing the alkali solution temporary storage area and the acid solution temporary storage area, the acid solution or alkali solution output from the input channel 1 can be respectively diverted to the two temporary storage areas for temporary storage.

[0034] In addition, the regulating system also includes an alkali zone pump and an acid zone pump. The alkali zone pump is installed in the alkali solution temporary storage area, and the output end of the alkali zone pump is connected to the acid solution channel 3. The acid zone pump is installed in the acid solution temporary storage area, and the output end of the acid zone pump is connected to the alkali solution channel 2.

[0035] It is worth noting that the output end of the alkali area pump is installed downstream of the acid storage area, and the output end of the acid area pump is installed downstream of the alkali storage area. At the same time, liquid level meters need to be installed in both the alkali storage area and the acid storage area.

[0036] Preferably, there are multiple communication positions between the alkali zone pump and the acid channel 3, and an acid-base detector 4 is provided upstream and downstream of each communication position. There are multiple communication positions between the acid zone pump and the alkali channel 2, and an acid-base detector 4 is provided upstream and downstream of each communication position.

[0037] In this embodiment, wastewater with acidity or alkalinity is used to neutralize wastewater with another acidity or alkalinity, thereby reducing the use of acid-base adjusting agents and increasing the wastewater treatment capacity.

[0038] Example 3

[0039] The difference between the present embodiment 3 and the embodiment 1 is that an eddy current zone 8 is provided in the middle of the input channel 1 , and the detection end of the acid-base detector 4 is provided in the eddy current zone 8 .

[0040] Due to the large fluctuations in the flow rate during the wastewater discharge process, a large amount of air is likely to appear in the input channel 1, making the detection end of the acid-base detector 4 easily exposed to the air, affecting the measured data. Therefore, the eddy current area 8 is set so that when the wastewater flows through the eddy current area 8 in the input channel 1, a short-term convergence phenomenon will occur, thereby avoiding the detection end of the acid-base detector 4 from being exposed to the air, and improving the accuracy of the data measured by the acid-base detector 4.

[0041] Preferably, the input channel 1 includes a left side wall 1-1, a right side wall 1-2 and a bottom surface 1-3, and the left side wall 1-1 and the right side wall 1-2 are both arranged on the bottom surface 1-3. The left side wall 1-1 includes a left arc-shaped portion 1-4, and the two ends of the left arc-shaped portion 1-4 are respectively connected to the wall structure extending in the straight direction. The right side wall 1-2 has a right arc-shaped portion 1-5 at a position close to the left arc-shaped portion 1-4, and the left arc-shaped portion 1-4 and the right arc-shaped portion 1-5 are in a relative relationship, and the bending angle of the left arc-shaped portion 1-4 is greater than 90°.

[0042] The area between the left arc-shaped portion 1 - 4 and the right arc-shaped portion 1 - 5 constitutes the eddy current zone 8 , and the input channels 1 at both ends of the eddy current zone 8 are arranged along the same direction.

[0043] In this technical solution, the wastewater flowing into the eddy zone 8 from the input channel 1 impacts the left arc portion 1-4 and is blocked, causing the wastewater to flow in the opposite direction, thereby forming a vortex, and the wastewater forms a short-term convergence phenomenon in this area.

[0044] In another specific embodiment, a gate 9 is provided on the alkaline solution channel 2 and the acid solution channel 3 respectively, and both gates 9 are electrically connected to the controller 7 , and the controller 7 controls the opening or closing of the two gates 9 .

[0045] In the present technical solution, the controller 7 only needs to control the opening or closing of the two gates 9 to directly control the opening and closing of the acid channel 3 and the alkali channel 2 .

[0046] Preferably, in this embodiment, for the convenience of description, the alkaline solution channel 2 and the acid solution channel 3 are both referred to as wastewater channels. Figure 5 The gate 9 includes a slide 9-1, a door panel 9-2 and a gate motor 9-3. The slide 9-1 has two slides, which are respectively vertically arranged on both sides of the wastewater channel, and the two sides of the door panel 9-2 are respectively slidably arranged in the two slides 9-1. In addition, a threaded hole arranged in the vertical direction is provided on the top of the door panel 9-2, and a screw rod 9-4 is matched in the threaded hole. One end of the screw rod 9-4 is dynamically connected to the output shaft of the gate motor 9-3. The gate motor 9-3 is electrically connected to the controller 7. The controller 7 controls the start, stop, forward or reverse rotation of the gate motor 9-3, so as to directly control the opening and closing of the gate 9.

[0047] Example 4

[0048] See also Figure 4 The difference between the present embodiment 4 and the embodiment 1 is that an impact part 10 is respectively provided on the alkali liquid channel 2 and the acid liquid channel 3. The impact part 10 on the alkali liquid channel 2 is located downstream of the output port of the acid material channel 5, and the impact part 10 on the acid liquid channel 3 is located downstream of the output port of the alkali material channel 6. There is a height difference between the two ends of the impact part 10, and the altitude of the upstream of the impact part 10 is higher than the altitude of the downstream of the impact part 10.

[0049] Generally, the substance used to neutralize acidic wastewater is limestone powder, and the substance used to neutralize alkaline wastewater is hydrochloric acid solution. By arranging the impact part 10 on the alkaline solution channel 2 and the acid solution channel 3, after the wastewater contacts with the acidic material or alkaline material used for neutralization, it can be fully mixed under the action of the impact force to achieve the purpose of full reaction.

[0050] Preferably, the impact portion 10 is a Z-shaped structure as a whole, and the middle of the impact portion 10 is a vertical plane structure, and a plurality of disrupting bodies 10-1 are arranged in the middle of the impact portion 10, and the disrupting bodies 10-1 are triangular prism structures, and one edge of the disrupting bodies 10-1 is arranged upward.

[0051] In this embodiment, by providing a plurality of disturbing bodies 10-1 in the middle of the impact part 10, the flow direction of the falling wastewater can be disturbed, thereby increasing the degree of confusion between the wastewater and the acidic or alkaline material used for neutralization, which is beneficial to the neutralization reaction.

[0052] Example 5

[0053] The difference between this embodiment 5 and embodiment 1 is that the acid-base detector 4 includes a first detector 4-1, a second detector 4-2 and a third detector 4-3. Among them, the detection end of the first detector 4-1 is set on the input channel 1, and the detection end of the second detector 4-2 is set on the alkali liquid channel 2 and is located downstream of the acid material channel 5. The detection end of the third detector 4-3 is set on the acid liquid channel 3 and is located downstream of the alkali material channel 6.

[0054] The three detectors are all electrically connected to the controller 7. The first detector 4-1 can detect the pH value of the wastewater, thereby controlling the flow direction of the wastewater and the opening and closing of the corresponding acid material channel 5 or alkali material channel 6. By setting the second detector 4-2 and the third detector 4-3, the pH value of the wastewater after the reaction can be fed back, thereby adjusting the opening degree of the acid material channel 5 or the alkali material channel 6.

[0055] Preferably, the acid material channel 5 is provided with a first acid material branch 5-1, and the output end of the first acid material branch 5-1 is arranged on the acid liquid channel 3 and is located downstream of the third detector 4-3. The alkali material channel 6 is provided with a first alkali material branch 6-1, and the output end of the first alkali material branch 6-1 is arranged on the alkali liquid channel 2 and is located downstream of the second detector 4-2. The opening and closing of the first acid material branch 5-1 and the first alkali material branch 6-1 are both controlled by the controller 7.

[0056] In this embodiment, after the pH value of the wastewater in the corresponding channel is detected by the second detector 4-2 and the third detector 4-3, the controller 7 determines whether to open the first acid material branch 5-1 and the first alkali material branch 6-1.

[0057] In another preferred technical solution, a second acid material branch 5-2 is provided on the acid material channel 5, and the output end of the second acid material branch 5-2 is provided on the alkali liquid channel 2 and is located downstream of the second detector 4-2. A second alkali material branch 6-2 is provided on the alkali material channel 6, and the output end of the second alkali material branch 6-2 is provided on the acid liquid channel 3 and is located downstream of the third detector 4-3.

[0058] This solution sets a second acid material branch 5-2 and a second alkaline material branch 6-2, and is mainly used when too much acidic material or alkaline material is added during the first neutralization reaction of wastewater, resulting in the wastewater being weakly acidic or weakly alkaline. The pH value of the wastewater can be restored to 7 again.

[0059] The technical solution in this embodiment is described by way of example: for example, when the first detector 4-1 detects that the wastewater is acidic, the controller 7 controls the acid channel 3 to open, the alkali channel 2 to close, and the alkali material channel 6 to open. At this time, the wastewater flows into the acid channel 3, and the alkali material channel 6 feeds alkaline material into the acid channel 3 to cause a neutralization reaction, and then the pH value of the wastewater after the reaction is detected by the third detector 4-3 and fed back to the controller 7. At this time, if the wastewater is still acidic, the controller 7 controls the first alkali material branch 6-1 to open, and continues to add alkaline material to the wastewater; if the third detector 4-3 detects that the pH value of the wastewater after the reaction is alkaline, the acidic material is added to the acid channel 3 through the second acid material branch 5-2 to reduce the pH value of the wastewater and restore it to a neutral state.

[0060] Through this technical solution, wastewater can be completely neutralized.

[0061] Example 6

[0062] According to the technical solutions of the above-mentioned embodiments 1 to 5, the acidic material in the acid material channel 5 is a hydrochloric acid solution, so solenoid valves 11 are provided on the acid material channel 5, the first acid material branch 5-1, and the second acid material branch 5-2. All solenoid valves 11 are electrically connected to the controller 7. The controller 7 controls the amount of acidic material added by controlling the opening and closing or the opening degree of the solenoid valves 11.

[0063] The alkaline material in the alkali material channel 6 is limestone powder. Generally, a spiral feeding structure 12 is respectively arranged in the alkali material channel 6, the first alkali material branch 6-1, and the second alkali material branch 6-2. The alkaline material is transported by the spiral feeding structure 12, and all the driving parts of the spiral feeding structure 12 are electrically connected to the controller 7. The controller 7 controls the amount of alkaline material added by controlling the operating speed of the driving parts of the spiral feeding structure 12.

[0064] Example 7

[0065] According to Embodiments 1 to 6, a gate 9 is installed downstream of all output ends of the alkali zone pump on the acid channel 3, followed by the alkali channel 6, the impact part 10 and the subsequent structures. A gate 9 is installed downstream of all output ends of the acid zone pump on the alkali channel 2, followed by the acid channel 5, the impact part 10 and the subsequent structures.

[0066] The subsequent structures of the impact part 10 on the alkaline solution channel 2 and the acid solution channel 3 are the same as those in the above-mentioned embodiment.

[0067] Through this structural design, when the wastewater in the production process cannot meet the corresponding demand, the wastewater can be further neutralized through the corresponding alkali material channel 6 or the acid material channel 5 in time.

[0068] Example 8

[0069] See also Figure 3 A method for treating wastewater based on the acid-base automatic adjustment system described in Examples 1-7 comprises the following steps: Step 1, introducing wastewater into the acid-base adjustment system through the input channel 1; Step 2, introducing the acid-base adjusted wastewater into the flotation machine, and adding flocculant and calcium chloride into the flotation machine; Step 3, the wastewater outputted by the air flotation machine is introduced into a sedimentation tank, and is allowed to settle in the sedimentation tank, and the sediment at the bottom of the sedimentation tank is made into a mud cake, which is then processed centrally; Step 4: Filter the liquid in the sedimentation tank and test it at the discharge port. If it meets the standards, it will be discharged directly. If it does not meet the standards, it will be returned to the collection tank for recycling treatment.

[0070] Specifically, the wastewater generated by production first passes through a high-concentration water pool to volatilize the water molecules in the wastewater to a certain extent, thereby increasing the concentration of the wastewater and reducing the volume of the wastewater.

[0071] The wastewater concentrated in the high-concentration water tank is introduced into the collection tank. An emergency water tank is set up according to demand. When the amount of wastewater in the collection tank is too much, it can be introduced into the emergency water tank for temporary storage.

[0072] The wastewater in the water collection tank is introduced into the input channel 1 of the acid-base automatic adjustment system, and the pH value of the wastewater is adjusted by the acid-base automatic adjustment system so that the pH value of the wastewater reaches 7.

[0073] The wastewater after acid-base adjustment through the alkaline solution channel 2 or the acid solution channel 3 is introduced into the flotation machine, and flocculants and calcium chloride are added into the flotation machine to condense the fine suspended matter in the wastewater. After being introduced into the sedimentation tank, the sediment at the bottom of the sedimentation tank is introduced into the sludge tank and made into mud cakes through the filter press for centralized treatment. In addition, the sediment in the flotation machine is also introduced into the sludge tank.

[0074] The liquid in the sedimentation tank is filtered and tested at the discharge port. If it meets the standard, it is directly discharged. If it does not meet the standard, it is returned to the water collection tank for circulation treatment. Generally, in this step, the liquid in the sedimentation tank is first filtered through the sand and gravel area, then adsorbed by the activated carbon area, and finally guided to the discharge port for testing. In addition, backwashing structures are also set up in the sand and gravel area and the activated carbon area, and the water generated by backwashing is introduced into the water collection tank.

[0075] In this technical solution, the wastewater generated in the production process can be treated to meet the requirements of the third-level standard of the "Integrated Sewage Discharge Standard" GB8978-1996 through the wastewater treatment method, and ammonia nitrogen and total phosphorus can meet the requirements of the B-level limit values ​​in the "Water Quality Standard for Sewage Discharge into Urban Sewers" (GB / T31962-2015).

[0076] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An acid-base automatic adjustment system, characterized in that: include: Three-way channels, namely input channel, alkali channel and acid channel; Acid-base detector, whose detection end is arranged in the input channel, and is used to determine the acidity and alkalinity of the liquid in the input channel; an acid material channel, the outlet of which is arranged on the alkali solution channel; an alkali material channel, the outlet of which is arranged on the acid liquid channel; A controller is electrically connected to the acid-base detector and is used to control the liquid to selectively flow into the alkaline solution channel or the acid solution channel.

2. The acid-base automatic adjustment system according to claim 1, characterized in that: The alkali solution channel is provided with an alkali solution temporary storage area, and the acid solution channel is provided with an acid solution temporary storage area; The regulating system also includes an alkali zone pump and an acid zone pump, wherein the alkali zone pump is connected to the alkali solution temporary storage zone and the acid solution channel, and the acid zone pump is connected to the acid solution temporary storage zone and the alkali solution channel.

3. The acid-base automatic adjustment system according to claim 2, characterized in that: There are multiple communication positions between the alkali zone pump and the acid liquid channel, and an acid-base detector is provided between each of the communication positions; There are multiple communication positions between the acid zone pump and the alkali solution channel, and an acid-base detector is arranged between each of the communication positions.

4. The acid-base automatic adjustment system according to claim 1, characterized in that: An eddy current zone is provided in the middle of the input channel, and the detection end of the acid-base detector is arranged in the eddy current zone; A gate is respectively provided on the alkaline solution channel and the acid solution channel, and the two gates are respectively electrically connected to the controller.

5. The acid-base automatic adjustment system according to claim 1, characterized in that: An impact portion is respectively provided on the alkaline solution channel and the acid solution channel, and the two impact portions are respectively located downstream of the alkaline solution channel and the acid solution channel; Both ends of the impact portion have a height difference, and the upstream of the impact portion is higher than the downstream thereof.

6. The acid-base automatic adjustment system according to claim 1, characterized in that: The acid-base detector comprises a first detector, a second detector and a third detector; The detection end of the first detector is arranged on the input channel; The detection end of the second detector is arranged on the alkali solution channel and is located downstream of the acid material channel; The detection end of the third detector is arranged on the acid liquid channel and is located downstream of the alkali material channel.

7. The acid-base automatic adjustment system according to claim 6, characterized in that: The acid material channel is provided with a first acid material branch, and the output end of the first acid material branch is provided on the acid liquid channel and is located downstream of the third detector; The alkali material channel is provided with a first alkali material branch, and the output end of the first alkali material branch is provided on the alkali liquid channel and is located downstream of the second detector.

8. The acid-base automatic adjustment system according to claim 7, characterized in that: A second acid material branch is provided on the acid material channel, and an output end of the second acid material branch is provided on the alkali solution channel and is located downstream of the second detector; The alkali material channel is provided with a second alkali material branch, and the output end of the second alkali material branch is provided on the acid liquid channel and is located downstream of the third detector.

9. A wastewater treatment method based on the system according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1, introducing wastewater into the acid-base adjustment system through the input channel; Step 2, introducing the acid-base adjusted wastewater into the flotation machine, and adding flocculant and calcium chloride into the flotation machine; Step 3, the wastewater outputted by the air flotation machine is introduced into a sedimentation tank, and is allowed to settle in the sedimentation tank, and the sediment at the bottom of the sedimentation tank is made into a mud cake, which is then processed centrally; Step 4: Filter the liquid in the sedimentation tank and test it at the discharge port. If it meets the standards, it will be discharged directly. If it does not meet the standards, it will be returned to the collection tank for recycling treatment.

10. The wastewater treatment method according to claim 9, characterized in that: The liquids output from the alkaline liquid channel and the acid liquid channel in the acid-base regulating system are introduced into the flotation machine; in the step 4, the liquid in the sedimentation tank is first filtered through the sand and gravel area, then adsorbed through the activated carbon area, and finally guided to the discharge port for detection; Wherein, backwash structures are respectively arranged for the sand and gravel area and the activated carbon area, and the water generated by the backwash is introduced into the water collection tank.

Images